Method of and apparatus for making cement-lined pipe



R., J. NEWSOM METHOD oF AND APPARATUS FOR MAKING CEMENT LINMD' PIPE Filed Nov. '1. 192e "xkf' on the ,line 6 6, Fig2, and

Patented May 17, 1927.

iiivi'rsn sarees -REEvEs .'i. NEWsoM, or LYNN, MASSACHUSETTS.

METHOD 0F AND APPARATUS FOR hisKrIlQ'Gv GEMENT-LIED PIPE.

Application filed November VvThis inventionrelates to a. method of and Aapparatus for making cement-lined pipe and is an improvement upon the invention disclosed in United States Patent No.1,548,161 f.

-granted to me August Ll, 1925. y

The present inventionhas for its object to f yproduce a cement-lined pipe having its ce! nient lining of substantiallyuniform thick-Ay ness circumferentially of the pipe for the length of the same irrespective of the condition of the inner surface o t the pipej j To this end provision is made for effecting an even distribution of lthe cement in plastic form circumferential-ly ofjthe pipe, and provision is also made forcompensating for theresistance to movement of the bodyv Y the pipe l@,Wliicli inner surface in some pipes of plastic cement` lengthwise of the pipe, offered by the inner surface fof the pipe.

These and other features of this invention tions of an iron or other pipe and an 'appa` ratus with which thevimproved method of manufacturing cement-lined pipe.v may be practised` M l Fig. l is a view iii elevation and section of a portion of the finished lpipe.

Fig. 5, a cross section on an enlarged scale on the line'5-K-5, Fig. 2;

Fig. 6 across sectionjon an enlarged scale,

l 7, across section Iof the iinished pipe oii an enlarged scale, taken on' thel lmet- 7,

rig. i.

Referring to Figs. 1, 2 and 3, a represents a pipe to be lined, -Which may be ofirevrn steel orother metal', and, of any desired size or diameter according Vto the use to which the lined pipe is to be put. 'f The three pieces or sections 10,12, 1-3 of pipe shown in Figs. 1, 2 and 3 form-part of a continuous length of pipe, the pieces 10, 1? beingtlie end portions and the piece 12, the

i intermediate portion `of said-pipe.

The pipe a is provided Vwith a finished lining b of cementitious material` (see Fig. 4), which is of's'ubstantially luniform thick-` ness circumferentially of the pipe for the'l length of the same, and which may be cement such as now 'commonly'used in the manufacture of cement pipe.

To provide the pipe a with the 'lining bof cement which is of substantiallyuniform thickness circumferentiallyof the pipe, a'

' ratus' as Will be described.

i, i926. sensi no. 145,451.

portion of the cement vvithin the pipe a While inplastic condition,'is distributed circum-vv ferentially'of the pipe. 'Y

This -vvill preferably be effected by appaf i The tinished cementA lining jis jfor-med from a massr lofl cementwhich fills the sov pipe a 'for a portion of iitsglength," prefer? j.

ably from l@ to lg'the length? of the pipe. The mass 15 of cement is moved forward lengthwise of the pipe a and the character'- ofthe liningb is influenced `bythe resistance 'l offered to the bodily movement of the mass of cement in the pipe a.

This resistance is varied by the 'character or physical .condition of the inner surfaceof V ment of the massV 15 ofcement, Whereas' l,when they inner surfaceof the ypipe ci is smooth orl substantially smooth a' minimum resistance is offered tothe movementfof the inass of cement in the pipe. v

Themass 15 of cement/in the pipe `afisy converted into-pa cement'pipe or lining o for the pipe a, by an apparatus Which' is drawn through' the pipe a and which Will be herein' after i'eferredto asthe mandrel, Whichlis vpreferably of the construction herein shown,l

and is provided with -a conical nose portion. y

20,J a tube-forming vsection 21, a distributing section 22, and additional tube-forming sections 23, 24. f

The sections referred to may and preferably VWill be detachably connected together in any suitablemanner, andthe distributing section 22 isfpreferably located between theV tube-forming sections 21, 323.V

The conical nose 20 is provided at its lrear end` With a collar 26 which inA some cases mayr besolid andinother cases maybe provided with slots 27' extended through thecollai, and the size or 'diameter of the collar26 may be varied toy ineetfthe interiorcondition of the pipe a.

The collar 26 determines kthe quantity of the Ina-'Ss of the cement lWhich is used toform fthe lining Vb; y l i o When the inner-"surface of the pipe fl, is

rough' and lprovided Awith projections, theff collar 26 is madesmall venough to afford a relatively free passage for the mandrel, and

when theinner surface of the pipe is 'smooth or substantially so, the collar is made ma'- terially larger but is provided with the axially extended slots'Q liorthe passage through them of a portion of the mass of' Cement,

and between these two extremes, the collar is provided with slots yof an area which varies according to the roughness ot the inner suri'acer of the pipe. l

AInathis maiiiier'tlie resistance offered `by theniassof cement inl front of the mandrel tothe passage of the mandrel through-it,

` due tovariations in, density ot the mass of i cement,` is materiallyfieduced.

v plastic .ce1nentg,z xtor portion l.of its -depth Variation in .the :thickness of the 1plastic.

'cement ilvhich passes `by the collar 26 and forms the lining-is taken.y care 'of by the helical vanes or blades 3() of the distributing memberr or section 22 of the mandrel, 'for as the mandrel is drawn through the pipe, the

or thickness, has imparted to it a movement Hwithin the pipe circninferentially thereof ternal diameter of the pipe. f Provision is made for restraining the free so as -toevenly distribute it circumferentiallyof thepipe Within the same and 'torni a plastic lining of substantially.uniform thicklness eircuingterentially of the pipe.

.After the plastic lining-has beenl rendered "of substantially uniform, thickness Yby the helical distributor, it is allowed topenpand by the succeeding section 23 ot the mandrel and is then .compressed by 'thelargen final Vformingesection or follower 24.

The tube-forming sections 2l, 23 ot' the mandrel are provided with ilexible Vguide members or vbow-shaped metal strips 32, 83, whichV are-.fastened at their jt'ront ends to the mandrel ,sections 21,23 respectively, and .aredesi'gned to engage" the inner surface ot the pipe and are rfree to vbe moved lengthwise to compensate for variations in the inends of the guiding members against twistring movement, that is, against movement 4cir-j cumferentially of the'inandrel, .and to this Vendjthe iiiee end-of the guide members are extended into axially arranged slots.

Dnc ,set 34 ,of slotsis located ina collar 36 on the rear end ot the mandrel section 2l and the other set 37 in the front end of the follower 24. f

In operationythe conical nose il() of the inandrelis entered'intothe plastic mass 15 of cement whichlills the rear'end ot' the pipe as'. indicated in Fig. l, and the mandrel and follower are drawn through the means of the wire or cord 40. l

V.AsV thev mandrel is drawn into the pipe c, it is centered therein by the front. set 32 of the lyieldingguidingmembers, and the portion ofthe .mass I5 of cement .engaged by thefront face of theV collar is pushed forward, vWhile another. ,portion passes between Pire by the collar 26 and the pipe and also through tien ot the slots 27 in the collar,l when the collar is slotted, and is converted into the torni" cire-inni ientially of the Vpipe and effects an even distribution .oi the ceineiitfabout. the n inner circumference ofsaid pipe and forms the tubular section 42 oft uniformV or substantially uniform' thickness.

Dn the further-progress of the mandrel throughA the pipe,vv the second set oiuguiding members Vengages thel pipe and assists irrir centering theii'iandrel within the pipe, and* on the continued advance of the mandreh' thetubular section l2 acted uponby the follower Zlwhich being of larger diameter than theinandrelfsection QBvrenlarges 'the in-` ternal diameter of the ,tubular sectionfl?, iiilsthe. slotsA thereiny formed by the vguiding members 83, and compressesand compacts the.. plastic massftliereoi to for-in the .iinished vlining,

From the above description, -it willbe seenthat the collar onthe nose engages a considerable amount oi-l themass of cement in irontV o'fit, and as the mandrel advances in the pipe, tthe collar llOYes forward the portion of the mass in contact with-it,A and thereby causes the mass front o-i' it to ofci' a substantially greater resistance to the :forward movement 'ofthe mandrel ,than

if the collar were .omitted and `vthereby effect longitudinal movement. cita greater 'amount or the cement while providing` sui:-

iicient spaceiior ther free passage'otthat portion of the plasticvniass which is to form the lining. This space as above stat-ed"y varies with tliccharacter ofthe inner sliiface ot' the pipe, being wholly between. thencollar and the pipe, when the ,collar ismsolid` and smallland the interior of the pipe oit' maximum roughness, and being partially between thecollar and thepipe ,and partially in ythe,

lll)

collar, as the interior of thepipe approach-es smoothness. y l i T -he mass of cement iiifroiitofthe inandrel varies indensity orfsolidity, andthe more solid par-tv otersf a greaterV resistance to the ladvance of the mandrel, with the resnlt 'that the` portion of greater solidityl Vleaves more cement behind the collar than does the lless solidportion of the cement and forms a tubular section Il1 of greater thickness on one side of the pipe than on the other, which-variation infthickness is oveiy come or at least reduced to a minimum by moving a portiongoi' the ,thicker-plastic .cement circumferentially Within the pipe so as fio siibstantially uniformv thickness effect these movements in the order described Aherein and with the apparatus slioivn,"it .is

not desired to limit the invention in this respect. n

lhat is claimed is:

l.. The method of making` cement-lined pipe'7 which consists iii moving` a portion of a mass of cement Within the pipe longitudinally thereof to forni a ltubular lining from the remaining portion of said massgand moving a portion of the tubular lining.

thus formed circumferentially of the pipe to form a tubular lining of substantially uniform thickness circumferentially of the pipe.

2. The method of making cementelined pipe, which consists in forming a. tubular lining section of cement Within the pipe, and moving a portion of said lining section cireumferentially of the pipe to render the tubular lining of substantially uniforml thickness circumferentially of the pipe.l 3. Apparatus for forming a tubular cement lining Within a pipe from a mass of plastic cement Within the pipe comprising a mandrel having a conical lnose provided with a collar of larger diameter thanA said nose to qeffect'movement of a portion of the cement mass and form a tubular section from another port-ion of vthe mass, and having a distributing section behindl said nose and collar having a helically arranged vane or blade to effect movement of a portion of said tubular cement section circnmferentially of the pipe to form a tubular section of ferentially of the pipe, and having a folcircumlower for con'ipressing the tubular section of" substantially uniform thickness.

4. `Apparatus forv forming a tubular cement Vlining Within a pipe from a' mass ofI plastic cement Within the pipe comprising y a mandrel having a `conicaly noseprovided with a collai of larger diameter than said nose to effect movement of a portion of the another portion of the mass.

` 5. Apparatus for forming altubular cef ment lining Within a pipe from aimassof plastic cement Within the pipe comprising a..v

mandrelhaving a conical nose provided with a slotted collar of Vlarger diameter thany said nose to'elfect movement of a portion ofthe cement mass andl form a' tubular section fromanother portion 0f themass. i 6. Apparatus for *forming atuloular ce-VV ment liningrWithin 'a pipel from ap. mass of plastic cement Within the pipe comprising a mandrel having means for distributing the cement circumferentiallyof the pipe to form a tubular lining ofy substantially uniform thickness circumferentially 'of the pipa 7; Apparatus for forming a ,tubular ce-'y' ment liningvvvithin a pipe from almass of plastic cement Within the pipe comprising a mandrel having centering devices anchored atvoiie end and having their oppositev ends free to move lengthwise of the mandrel, and n means rio-operating vvith said free ends to re `l f strain them from movement circumferen#vv y v 80 8. Apparatus for formingpa tubular ce-k tially of theV mandrel.- l

ment lining Within a pipe from' a mass of plastic cement Within thepip'e comprising a mandrel having vat vits front end a collar of larger diameter than the front end of the mandrel to effect movement of a` portionl of the cement mass and form a tubular section from another portion of the mass. i

In testimony whereof, I `have signed my name to this specification.`

` REEVES Newport` cement mass and form a tubularsection from ,55 Y 

